LINE 



688 



LINES 



Line (lin) \linea, a line]. In geometry, that ex- 

 tension of dimension which has length, but neither 

 breadth nor thickness. Also, the j 1 ^ part of an inch. 

 In anatomy, a boundary or guide-mark. A Table of 

 Lines is appended. L., Atmospheric, those lines of 

 Fraunhofer's spectrum due to absorption of light-rays 



by the atmosphere. L., Atrope, a name given by 

 Helmholtz to the perpendicular to the plane of the axes 

 of rotation of the eye. L., Colored (of the enamel), 

 one of the concentric striae of enamel prisms. They 

 may indicate the laminar formation of the enamel. 

 L.-writing. See Ataxiagram. 



TABLE OF LINES OR LINE/E. 



